package com.bilibili.juc.cf.one;

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ThenComposeTest {
    public static void main(String[] args) throws ExecutionException, InterruptedException {

        CompletableFuture<String> f = CompletableFuture.completedFuture("第一个任务");
        //第二个异步任务
        ExecutorService executor = Executors.newSingleThreadExecutor();
        CompletableFuture<String> future = CompletableFuture
                .supplyAsync(() -> "第二个任务", executor)
                .thenComposeAsync(data -> {
                    System.out.println(data);
                    return f; //使用第一个任务作为返回
                }, executor);
        System.out.println("最终结果：" + future.get());
        executor.shutdown();

    }
}
